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  <title>Release Notes for STM32WL33x CMSIS</title>
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<h1 id="release-notes-for">Release Notes for</h1>
<h1 id="stm32wl3xx-cmsis"><mark>STM32WL3xx CMSIS</mark></h1>
<p>Copyright © 2024-2025 STMicroelectronics<br />
</p>
<a href="https://www.st.com" class="logo"><img
src="_htmresc/st_logo_2020.png" alt="ST logo" /></a>
</center>
<h1 id="purpose">Purpose</h1>
<p>This driver provides the CMSIS device for the STM32WL3xx products.
This covers</p>
<ul>
<li>STM32WL33x devices</li>
<li>STM32WL3Rx devices</li>
</ul>
<p>This driver is composed of the description of the registers under
“Include” directory.</p>
<p>Various template files are provided to easily build an application.
They can be adapted to fit applications requirements.</p>
<ul>
<li>Templates/system_stm32wl3x.c contains the initialization code
referred as SystemInit.</li>
<li>Startup files are provided as example for EWARM©.</li>
<li>Linker files are provided as example for EWARM©.</li>
</ul>
</div>
<section id="update-history" class="col-sm-12 col-lg-8">
<h1>Update history</h1>
<div class="collapse">
<input type="checkbox" id="collapse-section6" checked aria-hidden="true">
<label for="collapse-section6" aria-hidden="true"> <strong>V1.3.1 /
20-November-2025</strong> </label>
<div>
<h2 id="main-changes">Main Changes</h2>
<ul>
<li>Added missing I2S support on WL3Rx devices (stm32wl3rx.h)</li>
</ul>
<h2 id="known-limitations">Known Limitations</h2>
<ul>
<li>None</li>
</ul>
<h2 id="development-toolchains-and-compilers">Development Toolchains and
Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1</li>
</ul>
<h2 id="supported-devices-and-boards">Supported Devices and boards</h2>
<ul>
<li>STM32WL3xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section5" aria-hidden="true">
<label for="collapse-section5" aria-hidden="true"> <strong>V1.3.0 /
29-October-2025</strong> </label>
<div>
<h2 id="main-changes-1">Main Changes</h2>
<ul>
<li>Added support to STM32WL3Rx product line.</li>
<li>[LCSC] LCSC_VER register removed from the accessible register list,
as it is Non-User.</li>
<li>[LCSC] Fixed a typo on an LCSC register name (COMP_CTN -&gt;
COMP_CNT)</li>
<li>[MRSUBG] RSSI_FLT bit #3 renamed to
<code>FREEZE_SYNC_ON_SYNC_OOK_PEAK_DECAY</code></li>
</ul>
<h2 id="known-limitations-1">Known Limitations</h2>
<ul>
<li>None</li>
</ul>
<h2 id="development-toolchains-and-compilers-1">Development Toolchains
and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1</li>
</ul>
<h2 id="supported-devices-and-boards-1">Supported Devices and
boards</h2>
<ul>
<li>STM32WL3xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section3" aria-hidden="true">
<label for="collapse-section3" aria-hidden="true"> <strong>V1.2.0 /
04-June-2025</strong> </label>
<div>
<h2 id="main-changes-2">Main Changes</h2>
<ul>
<li>Documentation based on jQuery 1.7.1 removed</li>
</ul>
<h2 id="contents">Contents</h2>
<ul>
<li>Add PULSETRIM bits definition in CMSIS header files</li>
<li>Renamed some interrupt to improve clarity and consistency</li>
<li>Added FQCY_BAND_ID bits definition for RF_INFO_OUT register</li>
</ul>
<h2 id="known-limitations-2">Known Limitations</h2>
<ul>
<li>CMSIS devices files are delivered “as is” and have not been fully
validated</li>
</ul>
<h2 id="development-toolchains-and-compilers-2">Development Toolchains
and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1</li>
</ul>
<h2 id="supported-devices-and-boards-2">Supported Devices and
boards</h2>
<ul>
<li>STM32WL3xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section2"  aria-hidden="true">
<label for="collapse-section2" aria-hidden="true"> <strong>V1.1.0 /
05-February-2025</strong> </label>
<div>
<h2 id="main-changes-3">Main Changes</h2>
<h3 id="release">Release</h3>
<ul>
<li>Release of CMSIS for STM32WL3xx devices</li>
</ul>
<h2 id="contents-1">Contents</h2>
<ul>
<li>CMSIS devices files for STM32WL3xx</li>
</ul>
<h2 id="known-limitations-3">Known Limitations</h2>
<ul>
<li>CMSIS devices files are delivered “as is” and have not been fully
validated</li>
</ul>
<h2 id="development-toolchains-and-compilers-3">Development Toolchains
and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1</li>
</ul>
<h2 id="supported-devices-and-boards-3">Supported Devices and
boards</h2>
<ul>
<li>STM32WL3xx devices</li>
</ul>
</div>
</div>
<div class="collapse">
<input type="checkbox" id="collapse-section1" aria-hidden="true">
<label for="collapse-section1" aria-hidden="true"> <strong>V1.0.0 /
30-October-2024</strong> </label>
<div>
<h2 id="main-changes-4">Main Changes</h2>
<h3 id="first-release">First Release</h3>
<ul>
<li>First Official Release of CMSIS for STM32WL33x devices</li>
</ul>
<h2 id="contents-2">Contents</h2>
<ul>
<li>CMSIS devices files for STM32WL33x</li>
</ul>
<h2 id="known-limitations-4">Known Limitations</h2>
<ul>
<li>CMSIS devices files are delivered “as is” and have not been fully
validated</li>
</ul>
<h2 id="development-toolchains-and-compilers-4">Development Toolchains
and Compilers</h2>
<ul>
<li>IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1</li>
</ul>
<h2 id="supported-devices-and-boards-4">Supported Devices and
boards</h2>
<ul>
<li>STM32WL33x devices</li>
</ul>
</div>
</div>
</section>
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<p>For complete documentation on STM32 Microcontrollers </mark>, visit:
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